Surface-gage for parallel lining.



G. 0. DOST. SURFACE GAGE FOR PARALLEL LINING.

APPLIOATIOIT FILED SEPT.10, 1908.

Patented Dec. 14, 1909.

UNITED %TATE% PATENT FFTQE.

CARL or'ro nosr, or MAGDEBURG, GERMANY.

SURFACE-GAGE FOR, PARALLEL LININ G.

T 0 all whom it may concern:

Be it known that I, CARL OTTO Dos'r, a subject of the King of Prussia,and resident of Magdeburg, in the German Empire, have invented a new anduseful Improvement in Surface-Gages for Parallel Lining, of which thefollowing is a specification.

The said invention relates to surface gages having an angularlyadjustable needle carried by an angularly adjustable standard orsupporting rod; and consists in the construction and combination ofparts hereinafter more particularly set forth and claimed. 4

In the accompanying drawings Figures 1 and 2 represent elevations of myimproved surface gage taken at right angles to each other, the needlebeing horizontal; Fig. 3 represents a View similar to Fig. 2 (butwithout the standardadjusting devices) showing the needle adjusted to aninclined position; Fig. 4 represents a cross-section on the line A-B ofFig. 1; Fig. 5 represents a plan view of the surface gage in theposition of Figs. 1 and 2; Fig. 6 represents a horizontal sectionapproximately on line CD of Fig. 2; Fig. 7 represents a detail view of amodified form of the needleadjusting devices; Figs. 8 and 9 representdetail elevations, at right angles to each other, of another modifiedform of the same; and Fig. 10 represents a section on the line E F ofFig. 8.

The base plate, 3 of the gage, is provided with a raised integral lug rand an opening a: near the same. The upper part of said lug is formedinto a bearing 1" for a short headed horizontal shaft or bolt 1), oneend of which is reduced to receive a thumb nut 10, the other and headedend of said bolt or short shaft being extended to receive the pivot eyeor collar 8 on the proximate end of the standard or supporting rod (Z,between the head of said bolt or shortshaft Q) and the said bearing 1".The side of said eye or collar 8 facing toward bearing r is providedwith an annular series of teeth a, and the proximate face of saidbearing, which is extended laterally as a fixed annulus 1*, is providedwith a corresponding series of similar teeth, a, the teeth of eachseries being forced into the notches between the Specification ofLetters Patent.

Application filed September 10, 1908.

Patented Dec. 1st, 190%.

Serial No. 452,410.

teeth of the other series, when the thumbnut to is turned to draw on thebolt 7). These teeth are slightly flattened or trun cated at the points,so that they will not necessarily at first reach the inner ends of thenotches, in which case the attachment might be too loose after the partshave been slightly worn, or if one of them be unduly contracted orexpanded in any way. The

teeth thus truncated may be forced by the action of said nut deeper intosaid notches, if too loose at first, thereby compensating for such wearor accidental change of form and insuring absolute tightness of fitbetween the parts 8 and r when clamped together. Of course these partsmay readily be separated after loosening thumb nut w and slightlywithdrawing bolt e. The collar or eye 8 is then turned in eitherdirection on bolt or shaft 1; until it occupies the position desired, tohold the said standard vertically upward or downward, or horizontal,pointing to left or right, or inclined toward some intermediate point.The nut to is then tightened again, clamping said collar and standard inthe position thus attained. The standard cl turns with said collar 5,unless a vertically downward presentation he required. In this case thestandard (Z is separated from collar 8 by drawing the lower end of saidstandard out of a radial socket s of said collar, into which it isnormally tightly fitted. The said collar is then turned until the saidsocket is presented vertically downward over opening 00 and in linetherewith, and the proper end of the inverted standard is passed upthrough said opening 00 into said socket s. The base plate g of courseprevents the adjustment of said standard to any inclined position of asmall arc, of which said opening is the middle point; but said standardmay be adjusted by the means stated to any other position whatever ofthe circle described by said socket in turning said collar or eye onsaid bolt.

A pointer or needle a is adjustable longitudinally on standard d andalso angularly adjustable, to tip its point up or down. Said needle maytherefore be held at any desired point corresponding to the diameter ofa number of circles having the axis of shaft 1) as a center, and inaddition its operative end may be presented vertically upward ordownward, or horizontally to right or left, or at any interveninginclination. To effect the said adjustment lengthwise of the standard, Iuse two plates f and 72 vertically grooved in their inner faces to fitsaid standard, and clamping said standard detachably between them, asshown in Figs. 5 and 6. The outer plate f constitutes the head of a boltor arm f at right angles to standard (Z and the other end of said arm orbolt is reduced and screwthreaded to receive a thumb-nut c, whichoperates to clamp said plates f and it against the standard (Z. Said armor bolt passes through an opening in plate h, as indicated in Fig. 1.011 said bolt, between said nut and plate 71, there are a washer n, aclamping disk 9, and a sleeve or collar Z), also the pointer or needlea, clamped between said disk and collar; and the pressure of said nut asit turns on said bolt for tightening the latter is, of course,transmitted through the said parts a, g, a and b to said plate h, whilethe reverse movement of the bolt through said nut draws the plate fagainst said standard. On turning said nut to loosen said plates 7 and hon said standard, the said plates and the arm and pointer may obviouslybe raised or lowered, as desired, and again tightened in position at anyother point chosen on said standard.

The washer a does not turn, being provided with a flat face 1), whichfits against a similarly flattened face 0 of a part of the arm or boltThis latter face is long enough to permit said washer to slide along thesaid shaft a sumcient distance for the proper action of said thumb nut,or for freeing the plates f and h after said nut is turned reversely.

The disk 9 and collar or sleeve Z) are ro tatable on bolt or arm 7. Thegrooves in their faces, which combine to receive the needle or pointer(Z, are straight, following the chord of an arc of the circle describedby the peripheries of these two parts, clamping said pointer betweenthem. \Vhen said disk is loosened from said collar or sleeve, the saidneedle may be moved longitudinally through them, adjusting the length ofits operating end beyond said needle-clamping parts. Also the saidcollar and disk may then be turned on said bolt to vary the angularposition of said needle or pointer. This operation, however, isinconvenient, chiefly because it involves loosening the grip on thestandard, so that the arm f will slip down the same, unless held by handwith care, or otherwise supported. To avoid this inconvenience andfacilitate the angular adjustment of said needle, I have provided saidcollar with a radially extending rigid arm I), holding a sleeve-form nut2', which engages an adjusting screw 6 carried by bearings is (Fig. 6)of a supporting bracket 70, in the form of a broad inverted U, which ispivoted by an integral stud m, at its middle point, to the aforesaidplate 71.. This screw is provided with an integral winged head 6 forconvenience of turning it, and at the other end with a nut e and washer6 for securely holding it in any position to which it may be turned; Theturning of this screw e, in one direction or the other, of course causesthe sleeve nut 11 to travel accordingly along said screw, taking with itthe arm 6 and turning the collar or sleeve b and washer a, so as to varythe angle made by said pointer with said arm. The pivotal attachment ofthe supporting bracket allows it and the adjusting screw 0 to yieldprecisely according to the degree of such adjustment, as shown in Fig.8, and thus pre vents binding. This adjustment is easily elfected andleaves the plates f and h, the bolt f and nut 0 quite undisturbed, andthe needle a is not loosened. The means of adjusting said pointer are,of course, capable of use, as shown in Fig. 3, without any means foradjusting the standard d, the latter being held permanently in oneposition.

The modification shown in Fig. 7 substitutes for the pivot stud m aprojection m of bracket 70, said projection sliding in a slot h of plateh, these parts being sufficiently loose to prevent binding. Theprojection m slides up and down in the slot h, to allow for the changeof inclination of arm 6' during and after adjustment, screw 6 remainingin its original position.

In the modification shown by Figs. 8, 9 and 10, the arm 5 is dispensedwith and the sleeve or collar Z) is provided with peripheral worm teeth5 engaged by a rotatable worm e operated by the head 0 in the samemanner as screw 6, before described. In this construction the said wormhas its hearings in an extension ]L2 of the plate h, and this extensionalso surrounds a part of collar 6, and serves as an external bearing,taking the strain partly from bolt or arm Having thus described myinvention, what I claim as new and desire to secure by Letters Patentis:

In combination with the standard of a surface gage, a pair of groovedplates fitting thereon, an arm connected to one of said plates, andprovided with screw threads and a nut for loosening or clamping the saidplates on the said standard at will for vertical adjustment, a groovedcollar and grooved disk adapted to turn on said arm and to be tightenedor loosened by the same action of said nut which tightens the saidplates on the standard, a needle held by said In testimony, that I claimthe foregoing collar and disk, a supplemental adjusting as my invention,I have signed my name in 10.

screw, and a screw-threaded part, engaging presence of tWo Witnesses.

the latter and carried by said collar, in order that the action of saidadjusting screw and CARL OTTO DOST screw threads may turn the saidcollar and Witnesses:

adjust the angular position of said needle, HENRY EYOTZ,

substantially as set forth, A. B. GREEN.

